Marcos Lott
Florence
Summary
Dynamic and results-driven software engineer with over 4 years of experience in building high-performance financial platforms that manage substantial daily transactions. Expertise in React and TypeScript within the fintech sector has led to the successful architecture of critical systems in fast-paced, innovation-driven environments where performance and reliability are paramount.
Contributions at Avenue, a leading Brazilian investment platform targeting the USA market, include developing complex, high-concurrency applications that support over 70,000 concurrent users with real-time streaming capabilities. Proven track record of driving revenue growth, enhancing performance metrics, and delivering scalable solutions that handle peak daily volumes exceeding $75.51 million while maintaining zero downtime.
Overview
3
3
years of professional experience
1
1
Certification
Work History
Software Frontend Engineer
Avenue
São Paulo, Brazil
08.2024 - Current
- Architected and delivered UCITS Web, a European funds trading platform that generated $161K in commissions within 4 months and opened an entirely new revenue stream for the company. Built with React, TypeScript, and Redux Toolkit, with real-time WebSocket streaming for live market data.
- Designed and implemented the investment orders feature, handling 200K+ monthly orders across multiple asset classes (equities, ETFs, funds, fixed-income, and UCITS), directly supporting $620M+ in monthly transaction volume and serving as critical infrastructure for 70K+ monthly active users.
- Optimized real-time data streaming infrastructure by implementing exponential backoff and circuit-breaker patterns for EventSource connections using TypeScript and custom React hooks, eliminating UI freezing during high-volatility trading periods, supporting peak daily volumes of $75.51M.
- Led state management modernization initiative, refactoring Redux architecture from JavaScript to TypeScript while implementing SOLID principles and normalized data structures with Redux Toolkit, reducing re-render cycles by 60% and improving page load times by 57% (4.2s → 1.8s).
- Built an AI-powered migration agent using Cursor IDE and Claude AI that automated the Midas design system migration, accelerating team velocity and contributing +8% toward quarterly engineering goals while reducing manual migration time from weeks to hours.
- Avenue is a leading Brazilian fintech platform enabling retail investors to access U.S. and European markets, processing $620M+ in monthly transaction volume across equities, ETFs, funds, fixed-income, and international securities for 70K+ active users.
- Learn more about how I code through my GitHub @lottmarcos and what I've been thinking through my Medium @lott.marcos
Software Frontend Engineer
Dito CRM
Belo Horizonte, Minas Gerais, Brazil
01.2023 - 08.2024
- Developed and maintained core features of Dito's CRM platform serving hundreds of Brazil's largest retail companies, building solutions with React, TypeScript, and Redux that powered customer segmentation and behavioral analytics.
- Led development of Dito's Flutter tracking SDK used by major Brazilian retailers, implementing cross-platform user behavioral tracking with Dart and Flutter that enabled real-time analytics and personalized marketing campaigns across iOS and Android mobile applications.
- Contributed to frontend Identity and Access Management (IAM) system upgrade, implementing role-based access control (RBAC) features with React and TypeScript that improved security and user permission management across the platform for enterprise clients with complex organizational hierarchies.
- Established design pattern standards for the main dashboard repository (20,000+ commits), creating reusable React components with TypeScript and styled-components that improved development velocity and code maintainability across product teams.
- Built responsive data visualization dashboards using React and Chart.js, enabling marketing teams to analyze customer behavior, campaign performance, and conversion funnels in real-time with interactive charts and metrics.
- Implemented comprehensive testing practices with Jest for unit tests and Playwright for E2E testing, participating in CI/CD workflows and code reviews that maintained high code quality standards across the frontend codebase.
- Dito is a Brazilian technology company that revolutionized how retail brands connect with their customers through data-driven CRM and marketing automation. Serving major Brazilian retailers including Chilli Beans and Ingresso.com. Influencing R$500M+ in annual revenue.
Full Stack Developer
Fórmula Tesla UFMG
Belo Horizonte, Minas Gerais, Brazil
11.2022 - 04.2023
- Architected and developed an internal project management platform from end-to-end, handling team member coordination, task tracking, and resource allocation. Built with React and JavaScript for the frontend, Node.js and Express for the backend, and PostgreSQL for database management, serving 30+ team members across engineering disciplines.
- Designed the complete user interface in Figma and implemented responsive components with React, creating an intuitive dashboard for managing projects, deadlines, and team workflows that improved operational efficiency during the competition season.
- Developed real-time telemetry dashboard for the electric race car, processing and visualizing live sensor data from the vehicle during testing and competitions. Built with React with real-time connections to display critical metrics including battery performance, motor temperature, speed, and energy consumption with sub-second latency.
- Implemented RESTful APIs with Node.js and Express, designing database schemas in PostgreSQL for user authentication, project management, and telemetry data storage, ensuring data integrity and scalability for the team's operations.
- Collaborated with mechanical and electrical engineering teams to define telemetry requirements and data visualization needs, translating technical specifications into functional software solutions that supported the team's competitive performance.
- Fórmula Tesla UFMG is a competitive university engineering team that designs, builds, and races electric vehicles in national championships. The team develops autonomous and telemetry systems for high-performance electric race cars.
- This significant experience marked my inaugural foray into the professional world of programming. Over the course of six months as a team member, I gained such an invaluable expertise. It was an intense learning period that solidified my passion for web development.
Education
Bachelor of Science - Computer Information Systems
Universidade Federal De Minas Gerais
Brazil12.2025
Skills
- React
- NextJS & NodeJS
- Redux & Redux Toolkit
- JavaScript & TypeScript
- Cypress, Playwright & Jest
- Real-Time Data Streaming
- High-Concurrency Systems
- AI-Powered Development Tools
- Code Coverage & Quality Metrics
- Adaptability in high-impact innovation environments
- Payment Systems Integration & Financial Trading Platforms
Certification
- University Extension Course: Python Program Composition
- Creative Entrepreneurship Course LIGA!
- JavaScript for Front-end Training
- Manage State in React with Redux Training
- CS50x
Languages
Portuguese (Native or Bilingual)
English (Full Professional)
Italian (Professional Working)
Timeline
Software Frontend Engineer
Avenue
08.2024 - Current
Software Frontend Engineer
Dito CRM
01.2023 - 08.2024
Full Stack Developer
Fórmula Tesla UFMG
11.2022 - 04.2023
Bachelor of Science - Computer Information Systems
Universidade Federal De Minas Gerais